Catalyst-Free Growth of Vertically Aligned ZnO Nanostructures Arrays on Periodically Polarity-Inverted Substrate
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概要
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We report vertically aligned ZnO nanostructures grown using periodically polarity-inverted (PPI) ZnO heterostructures on (0001) Al2O3 without the aid of a catalyst. In order to fabricate the PPI ZnO templates, the polarity control of ZnO film via in situ crystal polarity control methods using CrN and Cr2O3 buffer layers was used. Vertically aligned ZnO nanowires or nanowalls were formed only on the Zn-polar regions. The self-catalyzed process on the Zn-polar surface was most likely responsible for this selective growth. Finally, we determined the mechanism of nanowall formation on the basis of the coalescence of several nanowires in the defined area.
- 2010-10-25
著者
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Yao Takafumi
Center For Interdisciplinary Research Tohoku University
-
Park Sung
Department Of Materials Science And Engineering Seoul National University
-
Kim Ki
Japan Fine Ceramics Center
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Yoon Euijoon
Wcu Hybrid Materials Program Department Of Materials Science And Engineering Seoul National Universi
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Park Sung
Department Of Anesthesia And Pain Medicine School Of Medicine Pusan National University
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Park Jinsub
Wcu Hybrid Materials Program Department Of Materials Science And Engineering Seoul National Universi
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